MIL-STD-1570A, MILITARY STANDARD: OIL ANALYSIS IN EQUIPMENT DESIGN, PROVISIONS FOR (04 JUN 1987) [NO S/S DOCUMENT]., The purpose of this standard is to ensure that provisions for the Oil Analysis Program (OAP) are included in the design, development, and fabrication of equipment employing lubrication fluids in enclosed aeronautical and nonaeronautical mechanical systems. Design must facilitate OAP sampling to minimize manpower requirements and ensure the ability to take a representative sample.